IMA mineral species

Antofagastaite

Na₂Ca(SO₄)₂·1.5H₂O

Hydrous sulfate mineral.

Antofagastaite specimen — Antofagastaite.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formula	Na₂Ca(SO₄)₂·1.5H₂O
Elements	Na, Ca, S, O, H
Crystal system	—
Mohs hardness	—
Density	—
Streak	—
Color	—
IMA symbol	Atf

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

🌍 Where it's found

Type locality (where it was first described): Mejillones Peninsula, Chile

Type locality
Notable source / deposit
Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

Learn more

Antofagastaite on Mindat.org
Wikidata item Q57815014 (source of this page's data – you can correct it there)